Pillow-Jak™ will be an awesome add to any mechanic's tool box. This is NOT for opening car doors

Pillow-Jak™ is still undergoing development but will likely become available later this year. In the mean time, buy the Goose-Grip™ work light you see here at goosegrip.com

New tool for professional mechanics can be used for many different applications too numerous and varied to list them but here is a few that we have already used PJ many times.

Move an engine slightly to achieve engine mounting bolt hole to bolt alignment by inflating between a fixed place like a firewall and a spot on the engine.
Place between a fixed place and a wrench on a tough to get leverage on a fastener to break it loose without using your arms.
Place between a fixed place and any component that needs to be held in place while attempting to start threading mounting bolts - example - a starter that wants to fall and you are unable to hold the starter in place with one hand and reach around to install the bolts because of obstructions that do not permit the use of both hands at the same time.
Disconnect stubborn items that you removed the mounting bolts but they need additional pressure behind them to break them loose - when there is sufficient room to go behind.
I used PJ to pop the trim panel without damage on a sliding door on a Town & Country, felt way better than a pry wedge.

Also, I found out a study was done to determine what is the majority motivating factor for random social media down-votes when there is no actual real basis for this negative choice. They found that all of the people that down-voted excellent flawless posts had been bullied in middle school and had small genitalia.